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net/mlx5_core: Fix race in create EQ
After the EQ is created, it can possibly generate interrupts and the interrupt handler is referencing eq->dev. It is therefore required to set eq->dev before calling request_irq() so if an event is generated before request_irq() returns, we will have a valid eq->dev field. Signed-off-by: Eli Cohen <eli@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -374,15 +374,14 @@ int mlx5_create_map_eq(struct mlx5_core_dev *dev, struct mlx5_eq *eq, u8 vecidx,
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snprintf(eq->name, MLX5_MAX_EQ_NAME, "%s@pci:%s",
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name, pci_name(dev->pdev));
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eq->eqn = out.eq_number;
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eq->irqn = vecidx;
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eq->dev = dev;
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eq->doorbell = uar->map + MLX5_EQ_DOORBEL_OFFSET;
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err = request_irq(table->msix_arr[vecidx].vector, mlx5_msix_handler, 0,
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eq->name, eq);
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if (err)
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goto err_eq;
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eq->irqn = vecidx;
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eq->dev = dev;
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eq->doorbell = uar->map + MLX5_EQ_DOORBEL_OFFSET;
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err = mlx5_debug_eq_add(dev, eq);
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if (err)
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goto err_irq;
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